Use cargo hakari to automate workspace-hack (#2472)

This PR integrates workspace-hack (via [cargo hakari](https://crates.io/crates/cargo-hakari)), this fixes the huge space amplification that we had with rocksdb builds, and it building/checking individual crates becomes significantly faster after the initial build.

The cost of this:
- Slightly longer initial build time (but I didn't really notice much difference on my machine)
- I removed io-uring optional feature (easy to add back when we decide to give it another try) from rocksdb
- After adding new third-party dependencies, make sure you run `cargo hakari generate`, don't worry, CI will catch if you didn't.

This is a non-destructive change, and running with `cargo hakari` disable should still work if this is needed.

.config/hakari.toml

@@ -0,0 +1,21 @@
+# This file contains settings for `cargo hakari`.
+# See https://docs.rs/cargo-hakari/latest/cargo_hakari/config for a full list of options.
+
+hakari-package = "workspace-hack"
+
+# Format version for hakari's output. Version 4 requires cargo-hakari 0.9.22 or above.
+dep-format-version = "4"
+resolver = "2"
+
+# Add triples corresponding to platforms commonly used by developers here.
+# https://doc.rust-lang.org/rustc/platform-support.html
+platforms = [
+    "x86_64-unknown-linux-gnu",
+    "aarch64-apple-darwin",
+]
+
+# Write out exact versions rather than a semver range. (Defaults to false.)
+# exact-versions = true
+
+[traversal-excludes]
+workspace-members = ["service-protocol-wireshark-dissector"]

.github/workflows/ci.yml

@@ -9,6 +9,22 @@ on:
       - main
 
 jobs:
+  workspace-hack-check:
+    name: Check workspace-hack
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: -D warnings
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install cargo-hakari
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-hakari
+      - name: Check workspace-hack Cargo.toml is up-to-date
+        run: cargo hakari generate --diff
+      - name: Check all crates depend on workspace-hack
+        run: cargo hakari manage-deps --dry-run
   build-and-test:
     name: Build and test (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
@@ -23,8 +39,9 @@ jobs:
     env:
       RUST_BACKTRACE: full
     steps:
-      - name: Install liburing
-        run: sudo apt-get update && sudo apt-get install -y liburing-dev
+      # Disabled as uring is not used in production yet.
+      # - name: Install liburing
+      #   run: sudo apt-get update && sudo apt-get install -y liburing-dev
 
       - uses: actions/checkout@v4